11 Va. Admin. Code § 10-150-200
For Standardbreds, time trials are permitted with the permission of the licensee and the commission provided that (i) the horse is subject to post-race testing; (ii) an electronic timing device is utilized; (iii) if the horse is accompanied by prompters, the prompters shall not precede the horse; and (iv) the stewards are present.
§ 59.1-369 of the Code of Virginia.
Derived from Virginia Register Volume 18, Issue 23, eff. July 1, 2002.